The Patent Finder
US

Method and Apparatus for Cementing While Running Casing in a Well Bore

US 9,598,925 In force
OverviewFamilyAssignmentsSources & methods

Term ends May 16, 2027 · High confidence

Filed Oct 22, 2013 as application 14/060,014 · Granted Mar 21, 2017
Base term plus 654 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
20 years from filing
2010 2030
Clock starts
May 21, 2010
Term ends
May 16, 2027
Granted
Mar 21, 2017
base term after the term ends fee events Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
654
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 7,607,481, US 7,841,410, US 7,918,278, US 8,215,396, US 8,256,515, US 8,561,700, US 8,622,130.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
4
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.

This patent's term runs 654 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 2 of 2 maintenance fees are paid so far. Confidence: High. from the record

How we calculated this date

One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts May 21, 2010, when application 12/785,017, the earliest non-provisional in its chain, was filed (this one was filed Oct 22, 2013)May 21, 2030High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+654 days, USPTO patent term adjustment recordMar 5, 2032High confidence
Terminal disclaimer capDisclaimer resolved from the filed document (refs US 7,607,481, US 7,841,410, US 7,918,278, US 8,215,396, US 8,256,515, US 8,561,700, US 8,622,130)capped to May 16, 2027High confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events2 of 2 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderMay 16, 2027High confidence

This family

US 8,561,700In force
Feb 2028
Feb 2028
US 9,598,925this patent
May 2027
May 2027
US 9,957,773In force
May 2027
May 2027
US 10,337,278In force
May 2027
May 2027
The applications whose file history this site holds. The family may have others.

Assignments

Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
RecordedAssignorAssigneeConveyance
Oct 17, 2014
Reel 34013, frame 444
Gulfstream Services, Inc.General Electric Capital Corporation, as Collateral AgentPatent Security Agreement
Aug 24, 2015
Reel 36435, frame 614
General Electric Capital Corporation, as the Current and Resigning Administrative AgentAntares Capital LP, as Successor Administrative AgentAssignment of Intellectual Property Security Agreements
Jun 28, 2018
Reel 46459, frame 743
Antares Capital LP, as Transferring Administrative AgentResolute III Debtco LLC, as Successor Administrative AgentAssignment of Intellectual Property Security Agreements
Aug 17, 2018
Reel 46860, frame 353
Resolute III Debtco LLC, as Administrative AgentGulfstream Services, Inc.Release of Security Interest

Sources

Google Patents · The patent document at USPTO · Assignment records at USPTO

USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup

Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.

The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited